Spindle bearing



Sept. 14, 1937. w. STAHLECKER- SPINDLE BEARING Filed April 25, 1935 in van [or-- Patented'Sept: 14, 1937 UNITED STATES PATENT OFFICE 2,093,255 srmpm BEARING Wilhelm Stahlecker, Bad Cannstatt, near Stuttgart, Germany Application April 25, 1935, Serial No. 18,105

In Germany July 23, 1934 8Claims. (c1. soc-152) My invention relates to bearings and more espebearing 9 embracing the bottom end of the spincially to bearings for high speed spindles. It is dle shaft 3. particularly concerned with the support of such I is the step plate supporting the bottom end spindles in substantially vertical position, in of the spindle shaft 3. This plate is arranged.

which the spindle is supported on a step bearing for free radial slidable motion on the bottom of 5 of some suitable kind, its upper part being surthe casing 8. I prefer filling the bottom part rounded by a neck bearing having the form of of the casing around the step plate ID with a an anti-friction bearing (ball or roller bearing). liquid such as oil, which serves for damping the It is an object of my invention to provide a oscillations of the spindle shaft and for lubri- 10 spindle bearing of the kind above described, eating the step and lower neck bearings. 10 which is arranged to allow the spindle a damped The spindle shaft 3 may rest with its point on pendulum motion. the step plate In, as shown in the drawing, it is To this end the upper neck bearing is associhowever also possible to guide this plate in vertiated with a spherical seat and the step bearing, cal and horizontal direction by a plane bottom instead of being rigidly connected with the movsurface and a cylindrical lateral surface. 15 able neck bearing, is arranged separately in the On the other hand it is not necessary that the casing surrounding the spindle and supporting step plate Ill rest on a plane surface of the spinthe bearings in such manner as to be capable of die casing 8. executing a movement in transverse direction In many cases it may prove more advantageous which is damped to comply with all requirements. to seat the step plate on a revolution surface, 20

To the upper neck bearing is apportioned anthe deepest point of which is located in an exother lower neck bearing, which is preferably 10- tension of the spindle axis and which rises on cated near the step bearing and is rigidly conall sides, such as a spherical or conical surface. E

- nected with the first or upper neck bearing. This This is illustrated in Fig. 2, where 2|] is the step lower neck bearing mainly serves for adjusting plate, while II is the spherical bottom of the 25 the upper neck bearing in a particularly easy spindle casing 8. In this arrangement'the weight and efficient manner on its spherical seat, in of the spindle shaft 3 and the parts carried by it accordance with the movements of the spindle, must always be lifted when the step bearing exewithout the adjusting forces being required to cutes a lateral movement, and this brings about be transmitted through the revolution bodies of an additional damping of its oscillations. 80 the antifriction bearing. As further shown in Fig. 2, the extension 5 of In the drawing affixed to this specification-and the sleeve need not form itself the lower neck 'forming part thereof, three forms of a spindle bearing, but a separate neck bearing [2 may be hearing embodying my invention are illustrated mounted in this extension.

3,3 diagrammatically by way of example. In the modification illustrated in Fig, 3 the step In the drawing: plate 2| is acted upon by a compression spring Fig. 1 is an axial section of the first form, while [3 inserted between an intermediate ring ll rest- Figs. 2 and 3 are similar views, drawn to a ing on the step plate 2| and a ring l5 fixed in the larger scale, of the bottom portions of the other casing 8. The contact surface between the step 40 two modifications. plate and the movable ring it may have conical Referring to the drawing and first to Fig. 1, or spherical form as shown at 22 in Fig. 3, where l are the cylindrical rollers of the upper neck the step plate is influenced by the ring I forced bearing, which run directly on a cylindrical surdown upon it by spring iii to retain its central face 2 of the spindle shaft 3.. The rollers I are position in the casing 8.

guided in a well known manner in the outer race- The new bearing here shown and described is l8, being held between two rigid rings, one of particularly suitable for use in connection with which (4) is formed in one piece with the race high speed spindles of any kind and quite partic- IB, while the other one I6 is formed separately. ularly for spinning spindles, which cannot always The roller bearing is mounted in a sleeve 6 be kept perfectly balanced during operation.

formed with a, spherical surface which is seated I wish it tobe understood that I do not desire 50 on a spherical seat 1 of the. spindle casing 8. to be limited to the exact details of construe.- Preferably the centre of curvature of the spherition shown and described for obvious modificacal seat is situated substantially in the centre tions will occur to a person skilled in the art.

of the neck bearing. 5 is an extension of the I claim:

bearing sleeve 6,.which is formed as another neck 1. A spindle bearing comprising in combina- 2 aooaass 5 contact with and. supporting said shaft, another neck bearing surrounding the lower part of said shaft and arranged near and above said step bearing and a sleeve rigidly connecting said two neck bearings, said sleeve being supported for pendulum motion separately from said step bearing, said spindle shaft being arranged to directly control the lateral sliding motion of and to have its oscillations damped by said step bearing.

2. A spindle bearing comprising in combina- 5 tion, a spindle shaft, three superposed bearings for said shaft, namely an upper antifriction neck bearing surrounding the upper part of said shaft, a separate laterally slldable step bearing in direct contact with and supporting said shaft, another, 20 neck bearing surrounding the lower part of said I shaft and arranged near and above said step bearing and a sleeve rigidly connecting said two neck bearings, said sleeve. being formed with a spherical surface enabling itto execute a pen- 25 dulum motion separately from said step bearing,

said spindle shaft being arranged to directly control the lateral sliding motion of and to have its oscillations damped by saidstep bearing. 1

3. A spindle bearing comprising in combina-' 30 tion, a spindle shaft, three superposed bearings for said shaft, namely an upper antifriction neck bearing surrounding the upper part of said shaft, a separate laterally slldable step bearing in direct contact with and supporting said shaft, another 5 neck bearing surrounding the lower part of said shaft and arranged near and above said step bearing and a. sleeve rigidly connecting said two neck bearings, said sleeve, being formed with a spherical surface enabling it to execute a pendulum motion separately from said step bearing,

said spindle shaft being arranged to directly control the lateral sliding motion of and to have its oscillations damped by said step bearing, the centre of curvature of the spherical surface of saidsleeve being located approximately in the centre point of said upper neckbearing. 4. A spindle bearing comprising in combina-.

tion, a spindle shaft, three superposed bearings for said shaft, namely an upper antifriction neck 50 hearing surrounding the upper part of said shaft,

a separate laterally slldable step bearing in direct contact with and supporting said shaft, another neck bearing surrounding the lower part of said shaft and arranged near and above said step 55 bearing and a sleeve rigidly connecting-said two neck bearings, said sleeve being supported for pendulum motion separately from said step bear-- ing, saidspindle shaft being arranged to directly control the lateral sliding motion of and to have 60 its oscillations damped by said step bearing, said upper neck bearing comprising cylindrical rollers arranged to roll directly'on acylindrical surface of said spindle shaft.

5. A spindle bearing comprising in combina- 65 tion, a spindle shaft, three'superposed bearings for said shaft, namely an upper antifriction neck bearing surrounding the upperpart of said shaft, a separatelaterally slldable step bearing in direct contact with and supporting said shaft, another neck bearing surrounding the lower part of said shaft and arranged near and above said step bearing and a sleeve rigidly connecting said two neck bearings, .said sleeve being jsupported for pendulum motion separately from said step bearing, said spindle shaft being arranged to directly control the lateral sliding motion of and to have its oscillations damped by said step bearing, a

casing surrounding said stepbearing and a body of damping liquid in said casing. 6. A spindle bearing comprising in combinatio a spindle shaft, three superposedbearings for said shaft,--- namely an upper antifriction neck bearing surrounding the upper part of said shaft, a separate laterally slldable step bearing in direct contact with and supporting said shaft, another neck bearing surrounding the lower part of said shaft and arranged near and, above said step bearing and a sleeve rigidly connecting said two neck bearings,. said sleeve being supported for pendulum motion separately from said step bear- 'ing, said spindle shaft being arranged .to directly control the lateral sliding motion of and to have its oscillations damped by said step bearing, said step bearing being formed with a cylindrical bottom surface and a casing surrounding saidstep "bearing and being formed with a hollow-cylindrical guide surface for said step bearing.

7. A spindle bearing comprising in combination, a spindle -shaft,- tlir'ee superposed bearings for said shaft, namely an upper antifriction neck bearing surrounding the upper part of said shaft,

a separate laterally slldable step bearing in direct contactwith and supporting said shaft, another neck bearing surrounding the lower part of said shaft and arranged near and above said step bearing and a sleeve rigidly connecting. said two neck bearings, said sleeve .being supported for pendulum motion separately from said step hearing, said spindle shaft .being arranged to directly control the lateral sliding motion of and to have its oscillations damped by said step bearing, and

additional means for forcing saidstep bearing downwardly.

8. A spindle bearing comprising in combination,-

a spindle shaft, three ,s'uperpomd bearings for-said shaft, namelyan upper antifriction neck bearing surrounding the upper part of said shaft, a sepa-.

' rate laterally slldable step bearing in direct contact with and supporting said shaft, another neck bearing surrounding the lower part of said shaft and arranged near and above said step bearing and a sleeve rigidly connecting said two neck bearings, said sleeve being supported for pendulum motion separately from said step bearing, said spindle shaft being arranged to directly control the lateral-sliding motion of and to have its oscillations damped by said step bearing, additional means for forcing said step bearing downwardly, and a sloping contact surface formed on said additional forcing means for centering said step bearing. s 

